[Bug]: None of the CSS @rule directives appear in the sidebar

[hamishwillee]

What information was incorrect, unhelpful, or incomplete?

For example

• additive-symbols.
• All the @media features are not there in sidebar: Update CSS media at rule descriptor page titles content#43831 (comment)

I think it applies to all of them, but if not, certainly "many".

What did you expect to see?

Sidebar links below the associated at-rule or media query

Do you have any supporting links, references, or citations?

See above.

Do you have anything more you want to share?

No response